Table 7 Comparision of evaluation metrics for piezoelectric sensor signal and acceleration signal.
Regression method | Signal type | Coefficient of determination (\({R^2}\)%) | RMSE | MAE |
|---|---|---|---|---|
LGBM | Piezoelectric sensor voltage | 99.68 | 0.47 | 0.09 |
LGBM | Structure acceleration | 98.96 | 0.72 | 0.24 |
DTR | Piezoelectric sensor voltage | 99.64 | 0.51 | 0.02 |
DTR | Structure acceleration | 98.67 | 0.09 | 0.07 |
RFR | Piezoelectric sensor voltage | 99.80 | 0.37 | 0.04 |
RFR | Structure acceleration | 98.54 | 0.79 | 0.21 |
BRR | Piezoelectric sensor voltage | 99.56 | 0.49 | 0.26 |
BRR | Structure acceleration | 78.81 | 2.48 | 1.57 |
MLP | Piezoelectric sensor voltage | 98.42 | 0.89 | 0.55 |
MLP | Structure acceleration | 83.88 | 1.96 | 1.01 |
FNN | Piezoelectric sensor voltage | 99.08 | 0.67 | 0.42 |
FNN | Structure acceleration | 83.30 | 2.05 | 1.08 |
